Hoisting apparatus



'A. C. RASMUSSENAND C. G. SCHMID.

HOISTING APPARATUS.

APPLICAHON HLED JULY 11,1921.

PatentedSept. 12, 1922;

3 SHEETSSHEET 1.

3 X a 3 w l PI. ll]

Age. RASIVIUSSEN AND 0. e. SCHMID.

HOISTING APPARATUS APTLICAHON FILED JULY 11,1921.

Patented Sept. 12, 1922.

3 SHEETSS HEET 3.

Patented Sept. 12., 1922.

UNITED STATES PATENT OFFICE.

ALVIN C. RASMUSSEN AND CARL Gr. $CI-IMIID, O3? INDIANAPOLIS, INDIANA, ASSIGNORS TO INSLEY MANUFACTURING COMPANY, OF INDIANAPOLIS, INDIANA, A CORPORA- TION OF INDIANA.

HOISTING APPARATUS.

Application filed July 11,

T 0 all whom it may concern:

Be it known that we, ALVIN C. RASMUS- SEN and CARL G. SoHMIo, citizens of the United States, residing at Indianapolis, in the county'ofMarion and State of Indiana, have invented a new and useful Hoisting Apparatus, of which the following is a specilication.

The object of our invention is to produce a simple and eflicient device readily adaptable to buildings of different heights and character by means of which construction materials, such for instance, as lumber for forms for concrete, reinforcing steel material in wheel barrows, may be readily carried to a hoisting mechanism and by the hoisting mechanism delivered to, and in some instances upon, the desired floor levels.

The accompanying drawings illustrate our invention. Figure 1 is an elevation of the apparatus, adjacent portions of the building being shown in section; Fig. 2, a plan of the parts shown in Fig. 1; Fig. 3 a front elevation of the hoisting and dump ing elements, on a larger scale; Fig. 4, a side elevation of the parts shown in Fig. 3 together with the dumping cam and Fig. 5 a fragmentary plan of the parts shown in Fi 4.

The primary hoisting and dumping ele ment comprises a pair of platform supporting bars or channels 10, which are supported by a substantially rectangular frame com-* prising an upper cross bar 11, a lower bar 12, side bars 13 and upwardly extending divergent braces 14, 14 connected at their lower ends to cross bars 12 by a gusset plate 15 and at their upper ends connected to cross bar 11 by gusset plates 16, 16. which also serve to connect the cross bar 11 with side bar 13. The outer ends of bar 10 are supported by diagonal braces 17 which, at their lower ends are connected to sidebars 13 by gusset plates 18, and at their upper ends to bars 10 by gusset plates 19.

The upper ends of side bars 13 are connected to the platform supporting bars 10 by gusset plates 20. Each gusset plate 20 carries a laterally projected roller 21 and each bar 10 carries a laterally projected roller22 parallel with the adjacent roller 21 and spaced therefrom for the purpose which will appear. Each gusset plate 16 carries a roller 23 adjacentrolls 21 and 22 1921. Serial No. 483,704.

but with its axis at right angles to the axes of rollers 21 and 22.

Each gusset plate 18 carries a laterally projected roller 24 having its axis parallel with the axis of roller 21 and normally in the same vertical plane; and also carries a laterally projected roller 25 having its axis parallel with the axis of roller 24 and normally in the same vertical plane as the axis of roller 22. The lateral spacing be tween the axes of each pair of rollers 24 and 25 is substantially the same as the lateral spacing between each pair of rollers 21 and 22, but the axis of roller 25 is placed somewhat higher than the axis of roller 24 for the purpose which will appear.

The lower ends of side bars 13 are connected to the adjacent ends of cross bars 12 by gusset plates 26 and each of these gusset plates carries a roller 27, the axis of which is parallel with the axis of the companion roller 23 and in the same vertical plane.

Gusset plate 15 carries a support 28 to which the lower end of a hoisting cable 29 may be attached.

The arrangement of each group of rollers 21, 22, 23 and 24, 25, 27 is such that each group will embrace and connect with three sides of a vertical guide 30 which may be conveniently formed of timber which, in practice, may be formed by successive lengths of 6 x 6 material supported upon a convenient footing andheld in vertical position along side of the building by braces 31 which are secured to the outer end side faces of the member so as not to interfere with the free passage of the roller groups.

In order to dump the load carried by the platform 33, which is supported by the bars 10, in case automatic dumping is desired, we provide a readily transportable cable stretcher which comprises a light horizontal frame 35, vertical members 36, 36, inclined members 37 and cam track 38 having a downwardly presented mouth 39 which, by proper placing of the frame 35 upon any desired floor of the building, may be brought into alinement to receive the rollers 22.

Sheave 40 for the hoisting cable 29 might be supported permanently upon frame 35 but we find that it is much more convenient to journal the sheave 40 at one end of a to extend back upon the flood level toform proper anchorage for the sheave.

The apparatus being primarily designed for handling material of considerable length,

such, for instance, as lumber, reinforcement bars, etc., it is desirable that a load be pre pared during the period of hoisting and, therefore, we provide a pair of loading zlfevices LL' which may be placed so as t flank the foot of the hoisting apparatus as shown in Fig. 2. Each of these loading devices consists of a frame 50 adapted to rest upon the ground and comprising a pair of tracks 51' having a length somewhat greater than twice the width of tht platform 33. Upon each pair of tracks is mounted a carriage 52 having a width substantially equal to the width of the platform 33-, the arrangement being such that the two carriages 52, 52 when projected beyond the vertical plane of movement of platform 33, as shown in Figs. 1 and 2, will serve for the support of the ends of the material to be hoisted and, after loading, may be shifted along tracks 51 so as to carry the accumulated material into position over the hoisting platform. v I

The primary hoisting and dumping apparatus, embodying the hoisting platform 33 and its carriersthe cam frame 35 and associated parts the frames 50, and the carriages 52, 52 and the sheave element 40-41, will be manufactured as individual units so that they may be readily transported, handled and assembled by the contractor.

At a convenient point along side the prospective building, the contractor will provile a pit60 of suflicient depth topermit the hoisting platform 33 to be lowered to a position slightlybelow' the plane of carriage 52 whenframes 50 are set upon the ground adjacent the pit 60, and the guide rails 30 will be erected in place and supported from the frame of the building or from the forms, being extended vertically from time to time as the building grows.

In case of a reinforced concrete structure, the contractor will find it readily feasible to set in the concrete of each floor level, con venient bolts 61 whiclrmay be utilized for clamping the cam frame 35 in place.

When the material to be handled, such for instance, as lumber or reinforced rods, may be'practically automati'callydumped at the desired floor level, the cam frame 35 will be placed in position and when the hoisting platform has neared its upper position, the rollers 22 will be engaged by the cams 38 and the entire platform structure will be automatically swung to the position showed in dotted lines in Fig. 1, the edgeof the platform adjacent the building being brought into conjunction with the upper ends of the inclinedmembers- 317 of frame 35, so that the load willbe allowed to slide from the hoisting platform onto the inclined members 37 and be there supported so that they may be It will be noted that during the lower part of the travel of the hoisting platform, the center of gravity of the structure relative to the hoisting cable is outside the hoisting plane and" consequently rollers 22 and 24 will act against the-guides 30. When rollers 22 come in contact with the cams 38, rollers 21 will have passed above'the upper ends of guides 30 and the entire hoisting platform structure will be swung around the point of contact between rollers '24 and the outer faces of guides 30 until the centerjo'f gravity of the loaded stri'ictu-re' has nearly reached the vertical plane of its point of' pivotalcontact. because theyare initially pla'ced higher than rollers 24, will move'away from the inner vertical faces of the guides eo'andthen again approach these faces at a point lower than rollers 24. t

As the center'of' gravity-of thelo'ad passes through the neutral plane, the hois tingplat' During this movement, rollers 25,.

form structure will pi' vot slightly about the 'will come in contact with guides 30. The

various parts may be so relatively placed,- as indicated in the drawings, that the kick as the center of gravity passes through the neutral plane will not-have any objection able effect upon the guides 30.

It will be noticed that'by'the above described construction the hoisting platform structure is directly pivoted upon the vertical guides 30" and'that we have entirely eliminated the usual primary'franie'slideable upon the vertical guides'and serving as a pivotal support for'the load-carrying and dumping plat-form.- r

We claim as our invention 1.- As an article of manufacture, a-hoi's't ing platform provided at its upper and lower ends with laterally projected guideengaging members, said guide engaging members at the lowerend being arranged in pairs, one of each pair being normally at a higher level than'the other of said pair,

and the members of each pair being laterally spaced for the reception of the guide member between the same.

2. In a hoisting apparatus, the combination of vertical guides, a hoisting platform cooperating with said guides by means of upper and lower guide-engaging members whereby the platfrom may swing laterally when the upper guide engaging members are carried beyond the vertical guides, a cam structure arranged at the upper end of the vertical guides to engage the hoisting platform and shift the upper endthereof laterally, a hoisting cable connected to the hoisting platform, and a sheave for said hoisting cable arranged below the dumping position, whereby said hoisting platfrom may be swung by the cam over the sheave.

3. In a hoisting apparatus, the combination of vertical guides, a hoisting platform having a direct swinging interlocking engagement With the guides permitting freedom of longitudinal movement of the hoisting platform upon the guides, means carried by the platform at an upper point normally engaging the guides to hold the upper end of the platform in load carrying position, a cam structure, means carried by the hoisting platform for engaging with the cam structure to swing the hoisting platform laterally to load delivering position, a hoisting cable attached to the lower end of the hoistin platform and a sheave for said hoisting cahle, arranged below the load delivering position of the hoisting platform.

at. In a hoisting apparatus, the combina tion of vertical guides, a hoisting platform provided at its lower end with a pair of laterally and vertically spaced guide-engaging members for each guide, members at a higher point on the platform engaging said vertical guides and arranged to prevent the tilting of the platform, and a hoistin cable attached to the platfrom at a point adjacent the lower guide-engaging members.

5. A hoisting apparatus comprising a vertically movable and laterally swingable load carrying platform, and a cam structure adapted to be placed at any desired level to engage the platform adjacent its upper end and swing the same laterally to load delivering position, said cam structure embodying inclined portions arranged to receive the load delivered thereto from the platform, when said platform is swung to load delivering position.

6. A hoisting apparatus comprising a load carrying platform provided with guide-engaging members permitting vertical move-- ment of the platform and a swinging load dumping movement of the platform, a cam structure adapted to be placed at any desired level, the cam structure and load carrying platform having inter-engaging members to produce lateral swinging movement of the upper end of the platform, an independent sheave carrying element and a hoisting cable connected to the platform and carried over the sheave element, said sheave element bein independent of the cam element whereby it may be placed either above or below a dumping position platform.

In witness whereof we, ALVIN C. Ras- MUSSEN and CARL G. SCHMID, have hereunto set our hands at Indianapolis, Indiana.

ALVIN O. RASMUSSEN. CARL G. SCHMID. 

